Locomotive boiler



March 2 1926. 1,575,051Y

` C. G. HAWLEY LOCOMOTIVE BOILER Filed May 13, 1922 000 o c9000 00Go o @vos o o o o Ocse o,a .so

ooo o Q o o oc oo oo OOO 00 o o o Patented Mar. 2, 1926.

UNITED STATES 1,575n5i PATENT OFFICE.

CHARLES GILBERT HWLEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO LOCOMOTIVE FIRE*- BOX COMPANY, OF CHICAGO, ILLINOIS, AKCORPORATION OF DELAWARE.

LOCOMOTIVE BOILER.

Application filed May 13, 1922. ASerial No. 560,659.

To all @071cm it ymay conce/rn Be it known that I, CHARLES GILBERT Hnwmir, a citizen of the United States, and a. resident of Chicago, Cook County, Illinois, have invented certain new and useful Improvements in and for Locomotive Boilers, of which the following is a specilication.

My invention relates to improvements in locomotive boilers which are equipped with vwater-circulating-and-steaming elements ofthe kind generally known as Nicholson thermic Siphons. A Siphon, so-called, comprises a substantially triangular hollow water wall occupying a vertical and longitudinal planel in the fireboX of the locomotive boiler. The lower end of the siphon presents a so-called intake neck, which, passing through the throat or flue sheet of the iirebox, communicates with the front water space or'llegof the boiler, taking the cooler water therefrom. The water, partially evaporated, is discharged through thel upper end of the Siphon, which presents the form of a longitudinal slot in the crown sheet of the fire box, providing ample space for the relatively quiet emergence of both water and steam. A iirebox, according to its size, may contain one, two or three of these siphons. The operation and advantages thereof are too well understood to require repetition.

The thermic Siphon is virtually suspended from the crown sheet of the lirebox, which, in effect, serves as the inverted base for the siphon. In consequence of this relation, as at present constructed, the throat or flue sheets of the Siphon-equipped firebox are subjected to the expansive and contractive stresses occasioned by the movement or attempted movement of the neck of the Siphon, with consequent diiiiculty in the maintenance oi" the structure at that point. The object of this invention is to overcome the indicated diiiiculty, and to that end I deliberately reverse the relation of crown sheet and throat sheet, making the latter the actual base from which all of the expansion and contraction movements must start.

The nature of my invention and the details will be readily understood on reference to the accompanying drawings, in which Fig;

l is a vertical longitudinal section of a siphonequipped locomotive `tirebox. Fig. 2 is a vertical transverse Section on the line 2 2 of Fig. 1. Fig. 3 is an enlarged ver# tical section depicting the new relation of the boiler throat and siphon neck.

The iirebox l herein shown is oi the comi bustion chamber type. However, as indiJ cated by the detailed 3, the invention is not restricted to such boxes, but comprehends all straight llue sheet fireboxes.

2 represents the crown sheet of the tireboX. 3 is the inner throat sheet of the firebox. 4; is the firebox wrapper sheet, which is part of the shell orn the boiler. is the outside throat sheet, and likewise is a part of the shell of the boiler. 6 represents the mud ring of the irebox. The body of the siphon S is usually of the generally triangular form herein shown. It is provided with the tubular intake neck S. According to this invention, the intake neck is extended into actual contact or engagement with'the outside throat Sheet 5, and, being adjusted in that position, the neck is secured to the inside throat sheet by an autogeneous weld 7. which joins the side surface of the neck to the edges of the opening in the Sheet 3. The Stay-bolts 8 are not particularly disturbed from usual positions.

As a precaution against possible movement between the lower end oi' the Siphon neck and the sheet 5, I may employ the step-plate 9, which is riveted to the sheet 5. The end ofthe neck S is held in a groove in the step-plate 9 and obviously is considerably strengthened thereby.

The end of the neck is out away as at S in order that a large communica-ting open-l ing may be provided through which water from the body of the boiler kmay enter the tubularl Siphon neck.

The top of the siphon, per standard practice, is flanged outwardly and welded to the crown sheet, leaving a large outlet opening therein, through which the water and steam freely rise into the boiler space above the crown sheet. The crown sheet as a whole is supported by closely spaced crown stays 10, arranged in longitudinal and transverse rows. The longitudinal rows 10 directly adjacent the outlets or upper ends of the siphons are composed of so-calledilexible radial stay-bolts, as indicated by the flexible ends 11. Such bolts, in additionto permitting bodily rotative movement of the lower ends of the staybolts,ialso admit of Aconsiderable vertical or longitudinal movement.

As will be apparent, a Siphon thus mouuted in the firebox and finding` its fixed point or base to be the Very rigid mud ring section of the tirebox of necessity extends purely from that point and vice versa contracts toward that point. Such differences of expansion and contraction as may occur between the siphons and the remainder of the lirebox are both permitted and absorbed by thc long crown bolts, and betterstill by the crcwn bolts of the flexible type. The structure defined is therefore virtually proof against destruction by expansion and contraction Stresses.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

l. A locomotive boiler lirebox in combination with a substantially triangular thermic Siphon or water-steaming wall forming a water passage between the throat ofv the iirebox and the space above the crown sheet thereof, said Siphon being structurally dependent from said crown Sheet5 and having a lower intake neck portion extending through the inner throat sheet, and a member on the inner surface of the outer throat sheet against which said neck portion has an end thrust bearing engagement as and for the purpose specified.

2. it locomotive boiler tirebox in combi` nation with a substantially triangular thermic Siphon or water-steaming wall forming a water passage between the throatl of the firebox and the space above the crown sheet thereof, said Siphon being structurally dependent from said crown sheet, and having a lower intake neck portion extending through the inner throat sheet and means secured to the inner surface of the outer throat sheet in which the end of said neck portion has an end thrust bearing engagement.

3. A locomotive boiler tirebox in combination with a substantially triangular thermic siphon or water-steaming wall forming a water passage between the treat of the iireboi; and the space above the crown sheet thereof, said Siphon being structurally dependent from said crown sheet, and having a lower intake neck portion extending through and beyond the inner throat sheet and a thrust receiving plate on the inner Surface of said outer throat plate, that part of said neck portion beyond the inner throat sheet being 'cut away at its top, and the extreme end thereof having an end thrust bearing against Said plate.

4. A locomotive boiler rebox in combination with a substantially triangular thermic siphon or watersteaming wall forming a water passage between the throat of the .tirebox and the space above the crown sheet thereof, said Siphon being stucturally dependent from said crown sheet, and having a lower intake neck portion, a neck extension passing through and fixed to the inner throat sheet and having interiitting engagement at one end with said lower intake neck, a thrust receiving plate ixed to the outer throat sheet near the mud ring, the other end of said neck extension being cut away to form an inlet opening and having a thrust bearing cgageinent with said plate.

In testimony whereof, I have hereunto set my hand this 6th day of May, 1922.

CHARLES GILEE'RT HAVL'EY. 

